mirror of
https://github.com/apple/swift-nio-extras.git
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0f878f95f0
Motivation: It's useful to know the overhead we could be adding by including the PCAP handler. Modifications: Add a new executable based on the NIO performance testing executable. Result: There is a new executable which runs a short test of sending and receiving data through the HTTP/1 handler using multiple eventloops and showing three options. 1) Vanilla 2) With in memory PCAP never written to disk 3) With a disk based PCAP.
40 lines
1.3 KiB
Swift
40 lines
1.3 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the SwiftNIO open source project
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//
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// Copyright (c) 2020 Apple Inc. and the SwiftNIO project authors
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// Licensed under Apache License v2.0
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//
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// See LICENSE.txt for license information
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// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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//===----------------------------------------------------------------------===//
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import Dispatch
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import NIO
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public func measure(_ fn: () throws -> Int) rethrows -> [Double] {
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func measureOne(_ fn: () throws -> Int) rethrows -> Double {
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let start = DispatchTime.now().uptimeNanoseconds
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_ = try fn()
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let end = DispatchTime.now().uptimeNanoseconds
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return Double(end - start) / Double(TimeAmount.seconds(1).nanoseconds)
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}
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_ = try measureOne(fn) /* pre-heat and throw away */
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var measurements = Array(repeating: 0.0, count: 10)
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for i in 0..<10 {
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measurements[i] = try measureOne(fn)
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}
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return measurements
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}
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public func measureAndPrint(desc: String, fn: () throws -> Int) rethrows -> Void {
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print("measuring\(warning): \(desc): ", terminator: "")
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let measurements = try measure(fn)
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print(measurements.reduce(into: "") { $0.append("\($1), ") })
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}
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